Which layover airport offers the lowest fares from Knoxville to Lisbon?

Flights via Washington, D.C. (IAD) offer the lowest average round-trip price of $760.

Which layover airport has the shortest connection time from Knoxville to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 45m.

What airlines fly to Lisbon?

United Airlines, American Airlines and British Airways are the top three most popular airlines that fly to Lisbon from Knoxville according to our data. United Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 4 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Knoxville and Lisbon?

Washington, D.C. (IAD) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

What is the cheapest airline that flies from Knoxville McGhee Tyson to Lisbon Humberto Delgado?

British Airways is the most popular carrier operating from Knoxville McGhee Tyson to Lisbon Humberto Delgado

Which layover airport has the shortest travel time from Knoxville to Lisbon?

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 9h 55m.

When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.

How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

As of May 2026, there are 3 operators available to choose from for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$388 Cheap Flights from Knoxville to Lisbon in 2026

Q: What is the typical price of a round-trip flight between Knoxville and Lisbon?

Prices are currently low for flights on this route. Typical prices usually range from $1,494 to $1,210. The lowest price recently found on this route was $857.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Knoxville to Lisbon

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:57 pm - 11:05 am

TYS

LIS

36h 08m

2 stops

5:05 am - 11:55 pm

LIS

TYS

23h 50m

2 stops

$857United Airlines

Sat, Sep 19 - Wed, Sep 30

5:57 pm - 11:05 am

TYS

LIS

36h 08m

2 stops

6:45 am - 11:55 pm

LIS

TYS

22h 10m

2 stops

$858United Airlines

Sat, Sep 19 - Wed, Sep 30

5:57 pm - 9:20 am

TYS

LIS

34h 23m

2 stops

6:45 am - 11:55 pm

LIS

TYS

22h 10m

2 stops

$859United Airlines

Sat, Sep 19 - Wed, Sep 30

6:02 pm - 9:20 am

TYS

LIS

34h 18m

2 stops

11:25 am - 8:53 pm

LIS

TYS

38h 28m

2 stops

$910Air Canada

Sat, Aug 15 - Sat, Aug 22

6:30 am - 9:20 am

TYS

LIS

21h 50m

2 stops

5:05 am - 8:48 pm

LIS

TYS

20h 43m

2 stops

$921United Airlines

Tue, Sep 8 - Wed, Sep 23

5:45 am - 10:30 am

TYS

LIS

23h 45m

1 stop

5:05 am - 8:48 pm

LIS

TYS

20h 43m

2 stops

$923United Airlines

Tue, Sep 8 - Wed, Sep 23

5:57 pm - 11:05 am

TYS

LIS

36h 08m

2 stops

5:05 am - 11:55 pm

LIS

TYS

23h 50m

2 stops

$926United Airlines

Sat, Sep 19 - Wed, Sep 30

5:45 am - 10:30 am

TYS

LIS

23h 45m

1 stop

12:20 pm - 11:57 pm

LIS

TYS

16h 37m

1 stop

$934United Airlines

Tue, Sep 8 - Wed, Sep 23

5:57 pm - 11:05 am

TYS

LIS

36h 08m

2 stops

12:20 pm - 11:55 pm

LIS

TYS

16h 35m

1 stop

$937United Airlines

Sat, Sep 19 - Wed, Sep 30

7:19 pm - 9:20 am

TYS

LIS

33h 01m

2 stops

11:25 am - 10:34 pm

LIS

TYS

40h 09m

2 stops

$948United Airlines

Sat, Jul 4 - Wed, Jul 15

United Airlines flights from Knoxville to Lisbon

Our best United Airlines deals on Knoxville to Lisbon flight tickets

United Airlines

Sep 19

TYS5:57 pmKnoxville McGhee Tyson

36h 08m

2 stops

LIS11:05 amLisbon Humberto Delgado

Sep 30

LIS5:05 amLisbon Humberto Delgado

23h 50m

2 stops

TYS11:55 pmKnoxville McGhee Tyson

$857

United Airlines

Sep 19

TYS5:57 pmKnoxville McGhee Tyson

36h 08m

2 stops

LIS11:05 amLisbon Humberto Delgado

Sep 30

LIS6:45 amLisbon Humberto Delgado

22h 10m

2 stops

TYS11:55 pmKnoxville McGhee Tyson

$858

United Airlines

Sep 19

TYS5:57 pmKnoxville McGhee Tyson

34h 23m

2 stops

LIS9:20 amLisbon Humberto Delgado

Sep 30

LIS6:45 amLisbon Humberto Delgado

22h 10m

2 stops

TYS11:55 pmKnoxville McGhee Tyson

$859

Air Canada flights from Knoxville to Lisbon

Our best Air Canada deals on Knoxville to Lisbon flight tickets

Air Canada

Aug 15

TYS6:02 pmKnoxville McGhee Tyson

34h 18m

2 stops

LIS9:20 amLisbon Humberto Delgado

Aug 22

LIS11:25 amLisbon Humberto Delgado

38h 28m

2 stops

TYS8:53 pmKnoxville McGhee Tyson

$910

Air Canada

Jul 3

TYS7:19 pmKnoxville McGhee Tyson

34h 46m

2 stops

LIS11:05 amLisbon Humberto Delgado

Jul 18

LIS11:25 amLisbon Humberto Delgado

41h 29m

2 stops

TYS11:54 pmKnoxville McGhee Tyson

$1,083

Air Canada

May 13

TYS9:50 amKnoxville McGhee Tyson

18h 30m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jun 23

LIS11:25 amLisbon Humberto Delgado

38h 31m

2 stops

TYS8:56 pmKnoxville McGhee Tyson

$1,116

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

5:57 pm-11:05 am

2 stops36h 08m

Lisbon Humberto Delgado

Wed 9/30

5:05 am-11:55 pm

2 stops23h 50m

$857

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

5:57 pm-11:05 am

2 stops36h 08m

Lisbon Humberto Delgado

Wed 9/30

6:45 am-11:55 pm

2 stops22h 10m

$858

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

5:57 pm-9:20 am

2 stops34h 23m

Lisbon Humberto Delgado

Wed 9/30

6:45 am-11:55 pm

2 stops22h 10m

$859

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 8/15

6:02 pm-9:20 am

2 stops34h 18m

Lisbon Humberto Delgado

Sat 8/22

11:25 am-8:53 pm

2 stops38h 28m

$910

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 9/8

6:30 am-9:20 am

2 stops21h 50m

Lisbon Humberto Delgado

Wed 9/23

5:05 am-8:48 pm

2 stops20h 43m

$921

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 9/8

5:45 am-10:30 am

1 stop23h 45m

Lisbon Humberto Delgado

Wed 9/23

5:05 am-8:48 pm

2 stops20h 43m

$923

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

5:57 pm-11:05 am

2 stops36h 08m

Lisbon Humberto Delgado

Wed 9/30

5:05 am-11:55 pm

2 stops23h 50m

$926

Quickest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Tue 9/8

5:45 am-10:30 am

1 stop23h 45m

Lisbon Humberto Delgado

Wed 9/23

12:20 pm-11:57 pm

1 stop16h 37m

$934

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 9/19

5:57 pm-11:05 am

2 stops36h 08m

Lisbon Humberto Delgado

Wed 9/30

12:20 pm-11:55 pm

1 stop16h 35m

$937

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 7/4

7:19 pm-9:20 am

2 stops33h 01m

Lisbon Humberto Delgado

Wed 7/15

11:25 am-10:34 pm

2 stops40h 09m

$948

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Knoxville to Lisbon

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

In general, February is the cheapest month to fly from Knoxville to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $480. If you are unable to visit Lisbon during the month of February, then departing from Knoxville during the month January is also very affordable. Most momondo users find prices during this month for around $502.

Can stopping save me money on Knoxville to Lisbon flights?

You could potentially save up to 21% on your flight if you consider stops on a Knoxville to Lisbon flight.

When to book flights from Knoxville to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Lisbon according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Fastest flight time	15h 05m
Direct flights	None

The fastest flight from Knoxville to Lisbon takes 15h 05m

There are no direct flights from Knoxville to Lisbon. There are no popular flight routes from Knoxville to Lisbon.

Search flight deals

Frequently asked questions about flying from Knoxville to Lisbon

How far is Knoxville McGhee Tyson to Lisbon Humberto Delgado by plane?
Lisbon Humberto Delgado is 3990.0 mi away from Knoxville McGhee Tyson. 15h 05m is a normal flight duration for this route.
When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
Prices for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport are updated daily.
How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
As of May 2026, there are 3 operators available to choose from for flights from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.
How old do you have to be to fly from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Lisbon Humberto Delgado Airport.
What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?
The required travel and health documents for your Lisbon Humberto Delgado Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lisbon Humberto Delgado Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Knoxville to Lisbon?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Knoxville to Lisbon is United Airlines (48% of total bookings). The next most popular airlines are British Airways (36%) and American Airlines (16%).

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $475	Free Cancellation	Rating 6.7 7,969 reviews	Search British Airways flights
United Airlines	PriceFrom $633	Free Cancellation	Rating 7.4 9,698 reviews	Search United Airlines flights
American Airlines	PriceFrom $654	Free Cancellation	Rating 7.1 11,669 reviews	Search American Airlines flights

Sintra

Ericeira

Fátima

Nazaré

Peniche

Setúbal

Estoril

Evora

Oeiras

Sesimbra

Leiria

Figueira da Foz

Zambujeira do Mar

Batalha

Óbidos

Tomar

Comporta

Sines

Torres Vedras

Almada

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Lisbon?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Lisbon. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Lisbon with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Lisbon flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Lisbon?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Lisbon from Knoxville.

I’m not ready to book a flight from Knoxville to Lisbon right now. Can momondo alert me if prices change?

Price alerts on flights to Lisbon from Knoxville are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Lisbon trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Wed 6/10

Wed 6/17

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Nearby airports

Airlines

Cabin classes

Other Portugal destinations

Other flights from Knoxville

Complete your trip

Feeling lucky

Airports servicing Portugal

Cheap flights from Knoxville to Lisbon from $388

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Lisbon departing on 10/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Knoxville to Lisbon

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

United Airlines flights from Knoxville to Lisbon

Our best United Airlines deals on Knoxville to Lisbon flight tickets

Air Canada flights from Knoxville to Lisbon

Our best Air Canada deals on Knoxville to Lisbon flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Knoxville to Lisbon that are best for you.

See travel insights to Lisbon from

How to get the cheapest flight ticket from Knoxville to Lisbon

What is the typical price of a round-trip flight between Knoxville and Lisbon?

What is the cheapest month to fly to Lisbon?

Can stopping save me money on Knoxville to Lisbon flights?

What is the cheapest airline that flies from Knoxville McGhee Tyson to Lisbon Humberto Delgado?

What airlines fly to Lisbon?

Which airport is the most popular layover for flights between Knoxville and Lisbon?

Which layover airport offers the lowest fares from Knoxville to Lisbon?

Which layover airport has the shortest travel time from Knoxville to Lisbon?

Which layover airport has the shortest connection time from Knoxville to Lisbon?

When to book flights from Knoxville to Lisbon

Cheap Knoxville to Lisbon (TYS to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Lisbon

Fastest flight time

Direct flights

Frequently asked questions about flying from Knoxville to Lisbon

Best airlines flying from Knoxville to Lisbon

Compare and see reviews for airlines that fly from Knoxville to Lisbon with momondo

Traveling to a place near Lisbon?

Why use momondo?

An easier way to manage your Lisbon trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Lisbon

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Lisbon

List of cabin classes available on flights landing in Lisbon. Availability may vary depending on flight origin and airline.

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Knoxville

According to popular flight searches on momondo this year

Complete your trip to Lisbon

Explore popular destinations other users love

According to popular flight searches on momondo this year